EP0369032A4 - Electret material and method of producing the same - Google Patents

Electret material and method of producing the same

Info

Publication number
EP0369032A4
EP0369032A4 EP19890905776 EP89905776A EP0369032A4 EP 0369032 A4 EP0369032 A4 EP 0369032A4 EP 19890905776 EP19890905776 EP 19890905776 EP 89905776 A EP89905776 A EP 89905776A EP 0369032 A4 EP0369032 A4 EP 0369032A4
Authority
EP
European Patent Office
Prior art keywords
electret
producing
electret material
ohms
molded article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890905776
Other versions
EP0369032A1 (en
EP0369032B1 (en
Inventor
Yoshiharu Toray Industries Inc. Okumura
Katsutoshi Toray Industries Inc. Ando
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toray Industries Inc
Original Assignee
Toray Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toray Industries Inc filed Critical Toray Industries Inc
Publication of EP0369032A1 publication Critical patent/EP0369032A1/en
Publication of EP0369032A4 publication Critical patent/EP0369032A4/en
Application granted granted Critical
Publication of EP0369032B1 publication Critical patent/EP0369032B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
    • H01G7/00—Capacitors in which the capacitance is varied by non-mechanical means; Processes of their manufacture
    • H01G7/02—Electrets, i.e. having a permanently-polarised dielectric
    • H01G7/021—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric
    • H01G7/023—Electrets, i.e. having a permanently-polarised dielectric having an organic dielectric of macromolecular compounds

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Filtering Materials (AREA)
  • Chemical Or Physical Treatment Of Fibers (AREA)
  • Refinement Of Pig-Iron, Manufacture Of Cast Iron, And Steel Manufacture Other Than In Revolving Furnaces (AREA)
  • Multicomponent Fibers (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

An electret material consisting of a molded article which has, as an inner component, a polar polymer with a volume resistivity of greater than 10<12> ohms.cm on lateral cross section and a non-polar polymer with a resistivity of greater than 10<14> ohms.cm that is intimately arranged on at least the opposing surfaces of the periphery of said inner component, the two polymers having such lateral cross sections being continuously arranged in the lengthwise direction. The invention further provides a method of producing the electret material by placing the composite molded article material between a ground electrode and a discharge electrode, and generating a DC high-tension electric field thereacross to obtain an electret thereof.
EP89905776A 1988-05-24 1989-05-22 Electret material and method of producing the same Expired - Lifetime EP0369032B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP63126755A JPH06104952B2 (en) 1988-05-24 1988-05-24 Electret fiber and manufacturing method thereof
JP126755/88 1988-05-24
PCT/JP1989/000511 WO1989011724A1 (en) 1988-05-24 1989-05-22 Electret material and method of producing the same

Publications (3)

Publication Number Publication Date
EP0369032A1 EP0369032A1 (en) 1990-05-23
EP0369032A4 true EP0369032A4 (en) 1991-07-10
EP0369032B1 EP0369032B1 (en) 1995-08-16

Family

ID=14943117

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89905776A Expired - Lifetime EP0369032B1 (en) 1988-05-24 1989-05-22 Electret material and method of producing the same

Country Status (6)

Country Link
EP (1) EP0369032B1 (en)
JP (1) JPH06104952B2 (en)
KR (1) KR900702550A (en)
AT (1) ATE126625T1 (en)
DE (1) DE68923847T2 (en)
WO (1) WO1989011724A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5709735A (en) * 1995-10-20 1998-01-20 Kimberly-Clark Worldwide, Inc. High stiffness nonwoven filter medium
US5721180A (en) * 1995-12-22 1998-02-24 Pike; Richard Daniel Laminate filter media
US5667562A (en) * 1996-04-19 1997-09-16 Kimberly-Clark Worldwide, Inc. Spunbond vacuum cleaner webs
DE60137855D1 (en) 2000-09-15 2009-04-16 Ahlstrom Nonwovens Llc DISPOSABLE WELDING METHOD AND METHOD FOR THE PRODUCTION THEREOF
JP2009203580A (en) * 2008-02-28 2009-09-10 Toray Ind Inc Electret melt-blown nonwoven fabric
EP2266792B1 (en) * 2008-03-27 2016-05-04 Asahi Glass Company, Limited Electret and electrostatic induction conversion device
CN101981456B (en) 2008-03-31 2013-11-06 旭硝子株式会社 Acceleration sensor device and sensor network system
KR20110008009A (en) 2008-04-17 2011-01-25 아사히 가라스 가부시키가이샤 Electret and Electrostatic Induction Converters
WO2010032759A1 (en) 2008-09-19 2010-03-25 旭硝子株式会社 Electret and electrostatic induction conversion device
WO2021193957A1 (en) 2020-03-26 2021-09-30 株式会社村田製作所 Composite fiber
JP7808846B2 (en) * 2022-06-30 2026-01-30 国立大学法人福井大学 Fiber and its manufacturing method

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS498400B1 (en) * 1969-09-10 1974-02-26
JPS5921964B2 (en) * 1977-04-13 1984-05-23 ダスキンフランチヤイズ株式会社 electrified fiber
JPS576762A (en) * 1980-06-14 1982-01-13 Kanebo Ltd Conductive composite fiber and its manufacture
JPS60199971A (en) * 1984-03-21 1985-10-09 株式会社日立製作所 Electret fiber and its production
JPS61231270A (en) * 1985-04-04 1986-10-15 東レ株式会社 Production of electret fiber sheet

Also Published As

Publication number Publication date
KR900702550A (en) 1990-12-07
JPH01298276A (en) 1989-12-01
EP0369032A1 (en) 1990-05-23
ATE126625T1 (en) 1995-09-15
WO1989011724A1 (en) 1989-11-30
DE68923847D1 (en) 1995-09-21
JPH06104952B2 (en) 1994-12-21
EP0369032B1 (en) 1995-08-16
DE68923847T2 (en) 1995-12-21

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